i have installed ubuntu 12.10 on my laptop to a folder named ubuntu in C drive. However the OS does not show up in the initial boot sequence. Do i need to change the file location/ convert it into a cd/dvd, if so How?

If I understand you correctly, you installed Ubuntu to a "folder"? This might mean one of two things:

1) You used wubi to install Ubuntu (i never tried wubi so I cant help in this)
2) you mean a partition instead of a folder? (though this is unlikely since you mentioned "in C")

If you are attempting to install Ubuntu side by side to Windows (i.e; dual boot) then you need to restart your computer & boot from the disk (or usb) & use the Ubuntu installer which guides you (note that there's a step where you need to create a partition for Ubuntu!)